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Chapter 10: The Origin and Diversification of Life on Earth

Chapter 10: The Origin and Diversification of Life on Earth. Clicker Questions. by Kristen Curran, University of Wisconsin-Whitewater. Why is it important that Urey and Miller’s experiment produced amino acids?. Because they are the building blocks of DNA

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Chapter 10: The Origin and Diversification of Life on Earth

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  1. Chapter 10: The Origin and Diversification of Life on Earth Clicker Questions by Kristen Curran, University of Wisconsin-Whitewater

  2. Why is it important that Urey and Miller’s experiment produced amino acids? • Because they are the building blocks of DNA • Because they are the building blocks of RNA • Because they are the building blocks of protein • Because they are the building blocks of triglycerides

  3. The biological species concept is not easily applied to bacteria and fossils. What other characteristics could we use to decide whether two different bacteria are two different species? • Observe asexual reproduction. • Measure the size of each bacteria. • Compare the sequences of specific genes in the bacteria. • All of the above.

  4. Which answer below is considered to be a postzygotic barrier to reproduction? • Two species of frogs mate at different times in the spring. • Birds about to mate need to go through specific courtship rituals. • The male gamete (pollen) of one flower is not compatible with the female organs of another flower. • Fertilization occurs, but the embryo dies before it is born. • There is a mechanical isolation that prevents fertilization.

  5. Which answer below would require the morphological species concept to delineate between the two species? • Dog and cat • Salmonella and E. coli • Cow and goat • Donkey and horse

  6. Classroom Catalyst Allopatric vs. Sympatric Speciation

  7. All of the answers below are examples of allopatric speciation except… • Salamanders that have migrated via two different routes display different color patterns. • There are 14 different species of finch on the Galapagos islands vs. one species on South America. • Two species of benthic fish are found in a volcanic crater that is known to have only been colonized by one species of benthic fish about 10,000 years ago. • Species of lobster on the east side of the isthmus of Panama are different from those on the west side.

  8. Which animals are represented in a monophyletic group indicated by the red arrow? Fish, bird, human, rat, and mouse Bird, human, rat and mouse Human, rat, and mouse Rat and mouse

  9. Below are genetic sequences for a gene found in four different species. Which species are the most closely related?Species A: AGT-CTA-CTT-ACT-ATC-CTA Species B: AGT-CTA-CTT-ACC-ATC-CTA Species C: AGT-AAA-CTT-ACC-ATC-CTA Species D: AGA-CTA-TTT-ACC-ATG-CTA Species A and B Species A and C Species A and D Species B and D

  10. Which structures below are homologous? Human forearm and a monkey’s forearm Fish fin and whale fin Butterfly wing and bat wing All of the above

  11. The ability of multiple species to evolve via adaptive radiations is due to _______ over time. Macroevolution Microevolution Punctuated equilibrium Gradual change

  12. Which single-celled organism below is considered to be most closely related to the first cell to exist on our planet? Plants Protists Bacteria Archeae Animals Fungi

  13. Humans can be classified as… Homo sapiens Eukarya Animals Vertebrates All of the above

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